細節
cover TRAVELLING POST OFFICES: 1914-42 selection of railway T.P.O. c.d.s. on envelopes with strikes of Laokay to Hanoi, Vinh to Hanoi (4), Tourane to Hue, Haiphong to Hanoi and Saigon to Tamky; other markings include censor; most are good to fine. (8)